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arXiv 1608.07918math.RT
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${\mathbb A}_n$型代数中不可约态射的极小右决定子

Minimal right determiners of irreducible morphisms in algebras of type ${\mathbb A}_n$

Xiaoxing Wu, Zhaoyong Huang

摘要:

设$Λ$是一个代数闭域$K$上的有限维${\mathbb A}_n$型代数,其中$Q$是可分解的,$|\Det(Λ)|$是不可分解左$Λ$ -模之间所有不可约态射的最小右决定子的个数.如果$Λ$是一个路代数,那么我们有$$|\Det(Λ)|= 2n-2, &\mbox{if $p=0$; } 2n-p-1, &\mbox{if $p\geq 1$,}$$,其中$p=|\{i\mid i$是$Q$中的一个源,带有$2\leq i\leq n-1\}|$。如果$Λ$是一个有界代数,那么我们有$$ |\Det(Λ)|= 2n-2, &\mbox{if $r=1$; } 2n-p-q-1, &\mbox{if $r\geq 2$,} $$,其中$q$是$Λ$的非零汇理想的个数,$r=|\{i\mid i$是$Q$中的一个汇,其中$1\leq i\leq n\}|$。

英文摘要:

Let $Λ$ be a finite dimensional algebra of type ${\mathbb A}_n$ over an algebraically closed field $K$ with the quiver $Q$ and let $|\Det(Λ)|$ be the number of the minimal right determiners of all irreducible morphisms between indecomposable left $Λ$-modules. If $Λ$ is a path algebra, then we have $$|\Det(Λ)|= 2n-2, &\mbox{if $p=0$; } 2n-p-1, &\mbox{if $p\geq 1$,}$$ where $p=|\{i\mid i$ is a source in $Q$ with $2\leq i\leq n-1\}|$. If $Λ$ is a bound quiver algebra, then we have $$ |\Det(Λ)|= 2n-2, &\mbox{if $r=1$; } 2n-p-q-1, &\mbox{if $r\geq 2$,} $$ where $q$ is the number of non-zero sink ideals of $Λ$ and $r=|\{i\mid i$ is a sink in $Q$ with $1\leq i\leq n\}|$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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